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Thread: RCB tripping

  1. #1
    Join Date
    Sep 2011
    Location
    ACT
    Posts
    82

    Default RCB tripping

    Thoughts please.
    We had storms this week and lost all power for a three days. When power returned one of the RCB trips and would not stay on. I isolated the fault to the ducted heating.
    I am perplexed, the RCB trips as soon as the ducted heating is plugged in (remains off)
    I tested the socket with another device and it's not the socket,
    Why would it trip when just plugged in, even the appliance is off.
    Do I need an electrician or a heating technician??
    I did think maybe the RCB itself is faulty!!

    Thanks so much for any advice and suggestion

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  3. #2
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,756

    Default

    It sounds Water or moisture has got into the ducted heating system electrics.

    Unplug the heater and use a multimeter to check heater plug resistance between Active and Earth and report back
    Ideally a Megger meter should to be used but a multimeter might be good enough.

    Finding the short can be a bath plug but lets see how you go with this.

  4. #3
    Join Date
    Sep 2011
    Location
    ACT
    Posts
    82

    Default

    Thanks. I'll do that tomorrow in the day time , providing it stops raining!! And report back

  5. #4
    Join Date
    Oct 2015
    Location
    Ringwood, VIC
    Posts
    575

    Default

    If it trips with the heating switched off, there could also be a circuit neutral - earth.
    As above, moisture where it shouldn't be..
    Leave it for a few days, it could dry out and clear the fault with no attention required.

  6. #5
    Join Date
    Sep 2011
    Location
    ACT
    Posts
    82

    Default

    Had a look and no earth leakeage. But on closer examination I can see that the circuit board where the power supply plugs into the board is burned and scorched.
    I am not sure if that is something I can fix or will it now need a new mother board ( I think that is what it's called)
    I am guessing it occurred when there was a power surge during the storm event.
    Any other thoughts before I call in a service technician?

    Thanks all

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